kernel/driver: modify the ps2/serial drivers to use ring_t

1 files changed, 1 insertions, 1 deletions

diff --git a/src/shared/container/ring.c b/src/shared/container/ring.c
index 525fade..8c56acd 100644
--- a/src/shared/container/ring.c
+++ b/src/shared/container/ring.c
@@ -27,7 +27,7 @@ void ring_put1b(ring_t *r, uint8_t byte) {
 
 size_t ring_get(ring_t *r, void *buf, size_t len) {
 	for (size_t i = 0; i < len; i++) {
-		if (at_end(r)) return i;
+		if (r->_head == r->_tail || at_end(r)) return i;
 		((uint8_t*)buf)[i] = ((uint8_t*)r->buf)[r->_tail++];
 		if (r->_tail >= r->capacity) r->_tail = 0;
 	}